Seguiremo i passaggi seguenti.
- Aggiungi una nuova colonna con TestID alla tabella esistente
- Aggiorna i record dalla colonna Id (Identity enable Column) alla colonna TestID (Newly Added).
- Elimina l'ID (colonna Identity Enable) dalla tabella
- Rinomina la colonna appena aggiunta ( TestID) in Id.
--Create Table with Identity Property
CREATE TABLE dbo.Employee ( Id INT IDENTITY(1,1), Name VARCHAR(10))
GO
--Insert the record after creating Table with Identity Property on Id Column
INSERT INTO dbo.Employee
VALUES('Shahzad')
GO
--Run to See the Data
SELECT * FROM dbo.Employee
--Find out all the columns for all the tables on which Identity Property is enabled
SELECT OBJECT_NAME(OBJECT_ID) AS TableName,name AS ColumnName FROM sys.columns
WHERE is_identity=1
/** Drop Identity ********/
--Add a new column with any name
ALTER TABLE dbo.Employee
ADD TestId INT
--Update the Records in newly Added column , in our case TestID
UPDATE dbo.Employee
SET TestId=Id
--Drop Identity Column
ALTER TABLE dbo.Employee
DROP COLUMN Id
--Rename the newly Added Column to Identity Column you had at first.
EXEC sp_rename 'dbo.Employee.TestId','Id','COLUMN'
Video demo:come eliminare la proprietà di identità di una colonna nella tabella di SQL Server